Effect of Mo content on the properties of graphite–MoC composites sintered by spark plasma sintering
Boletín de la Sociedad Española de Cerámica y Vidrio, ISSN: 0366-3175, Vol: 62, Issue: 6, Page: 588-596
2023
- 6Citations
- 9Captures
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Article Description
Graphite–molybdenum–titanium powders prepared by colloidal processing technique were sintered by Spark Plasma Sintering (SPS). This material is proposed in this manuscript due to its potential interest as heat sink. The influence of the molybdenum content (2.5, 5.0 and 10.0 vol.%) on the thermal, electrical, and mechanical properties of the composite are studied to define the composite with the best properties. Thermal, electrical, and mechanical properties of the composite graphite–10 vol.% Mo–1 vol.% Ti (that are composites of graphite with molybdenum and titanium carbides after sintering) are significantly better than those of the composites with lower molybdenum contents (2.5 vol.% and 5 vol.%). This way, flexural strength, electrical conductivity, and thermal conductivity are 1.5, 7.8 and 18 times greater, respectively, than in the composite graphite–2.5 vol.% Mo–1 vol.% Ti. In the case of comparing with the composite graphite–5 vol.% Mo–1 vol.% Ti, flexural strength, electrical conductivity, and thermal conductivity are 1.2, 5.1 and 3.2 greater in the composite graphite–10 vol.% Mo–1 vol.% Ti, respectively. Se sinterizaron por Spark Plasma Sintering (SPA) polvos de grafito-molibdeno-titanio preparados mediante la técnica de síntesis coloidal. En el presente manuscrito se propone este material debido a su potencial en disipadores de calor. Se estudió la influencia del contenido en molibdeno (2,5, 5,0 y 10,0 vol.%) en las propiedades térmicas, eléctricas y mecánicas del material compuesto para definir aquel con las mejores propiedades. De este modo, las propiedades térmicas, eléctricas y mecánicas del material compuesto grafito-10 vol.% Mo-1 vol.% Ti (que son composites de grafito con carburos de titanio y molibdeno tras la sinterización) son significativamente mejores que aquellas de los materiales compuestos con menores contenidos en molibdeno (2,5 vol.% y 5 vol.%). Así pues, la resistencia a flexión, la conductividad eléctrica y la conductividad térmica son 1,5, 7,8 y 18 veces superiores, respectivamente, a las del composite grafito-2,5 vol. Mo-1 vol.% Ti. Si la comparación se lleva a cabo con el material compuesto grafito-5 vol.% Mo-1 vol.% Ti, la resistencia a flexión, la conductividad eléctrica y la conductividad térmica son 1,2, 5,1 y 3,2 veces superiores en el material compuesto grafito-10 vol. Mo-1 vol.% Ti, respectivamente.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S036631752300016X; http://dx.doi.org/10.1016/j.bsecv.2023.02.005; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85150766310&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S036631752300016X; https://dx.doi.org/10.1016/j.bsecv.2023.02.005
Elsevier BV
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